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Get Started with Cardano Serialization Lib

This is a library for serialization & deserialization of data structures used in Cardano’s Haskell implementation of Shelley along with useful utility functions.

How can you use this library

Rust is wonderfully portable! You can easily bind to the native Rust library from any common programming language (even C and WebAssembly)!

NPM packages

Mobile bindings

Benefits of using this library

Serialization/deserialization code is automatically generated from Cardano’s official specification, which guarantees it can easily stay up to date! We do this using an EMURGO-written tool called cddl-codegen which can be re-used for other tasks such as automatically generating a Rust library for Cardano metadata specifications!

It is also very easy to create scripts in Rust or WASM to share with stake pools, or even embed inside an online tool! No more crazy cardano-cli bash scripts!

Powerful and flexible enough to be used to power wallets and exchanges! (Yes, it’s used in production!)


This library generates both Typescript and Flow type definitions, so it’s often easiest to see what is possible by just looking at the types! You can find the Flow types here.

You can also look in the example folder to see how to use this library from Typescript or just experiment with the library.

What about other versions of Cardano?

If you are looking for legacy bindings, you can find them at the following:

Original binary specifications

Here are the location of the original CDDL specifications:


If you need to install Rust, do the following:

curl -sSf | sh -s -- -y
echo 'export PATH=$HOME/.cargo/bin/:$PATH' >> $BASH_ENV
rustup install stable
rustup target add wasm32-unknown-unknown --toolchain stable
curl -sSf | sh

To build this repository, do the following:

git submodule update --init --recursive
nvm use
npm install
npm run rust:build-nodejs


npm run rust:test


To publish a new version to

npm run rust:publish

To publish new versions to NPM (only needed if you are an admin of this project)

npm run js:publish-nodejs
npm run js:publish-browser
npm run js:publish-asm